Former Korean Air executive Heather Cho has apologised for delaying a plane over a serving of nuts, in her first public appearance since the incident.
Her father, airline chairman Cho Yang-ho, also apologised at a news conference, amid a simmering backlash in South Korea.
He said Ms Cho, who has resigned from the airline, would be stripped of roles in affiliated companies.
The government is probing the incident, which has dominated headlines.
Ms Cho was onboard a Korean Airlines plane departing from New York for Incheon last week when she demanded a crew member to be removed, after she was served nuts in a bag, instead of on a plate.
Korean Air initially defended Ms Cho’s behaviour, noting that as vice-president overseeing flight service, she was responsible for making sure service standards were upheld. It later apologised.
On Friday afternoon Ms Cho bowed in apology when she spoke to reporters outside a government building, where she was due to meet transport officials.
“I sincerely apologise,” she said, adding that she planned to say sorry personally to affected crew members.
Hours earlier her father called a press conference and said he was apologising “as a father and head of Korean Air”.
He called his daughter’s conduct “foolish”, and added: “I beg the people to blame me for the current situation, because everything is my fault… I failed to properly educate my daughter.” Mr Cho bowed as he addressed reporters at the company’s headquarters
Mr Cho also announced that his daughter would step down from all her posts in companies under the Cho family-owned Hanjin Group, which also owns Korean Air.
Ms Cho was the chief executive of KAL Hotel Network, Wangsan Leisure Development, and Hanjin Travel Service, and also a board director of Korean Air, according to Yonhap news agency.